Documentation of Data Files and Programs for: 
Morley, J. and J. Piger (2012) "The Asymmetric Business Cycle" Review of Economics and Statistics 94, 208-221.

Data File:

gdp4706.txt:  contains quarterly time series of U.S. real GDP.  Runs from 1947Q1 to 2006Q4.  Obtained from FRED.


Programs:

rw.gau: GAUSS file, estimates AR(0) model and calculates statistics used in Table 2. Uses data file "gdp4706.txt". 

ar.gau: GAUSS file, estimates AR models (p=1,..,12) and calculates statistics used in Table 2. Also calculates BN cycles for AR models. Uses data file "gdp4706.txt".

uc.gau: GAUSS file, estimates linear UC models and calculates statistics used in Table 2. Also calculates filtered cycles for UC models. Uses data file "gdp4706.txt".

ham.gau: GAUSS file, estimates Hamilton model and calculates statistics used in Table 3. Uses data file "gdp4706.txt".

bb.gau: GAUSS file, estimates BB models and calculates statistics used in Table 3. Also calculates RDSS cycles for BB models. Uses data file "gdp4706.txt".

uc_nl.gau: GAUSS file, estimates nonlinear UC models and calculates statistics used in Table 3. Also calculates filtered cycles for UC models. Uses data file "gdp4706.txt".

model_average.gau: GAUSS file, calculates model-averaged measure of the business cycle reported in Figures 3 and 4.

chp_ar.gau: GAUSS file, calculates CHP test statistic for AR(2) vs. Hamilton Model (both with Gaussian errors). Also, calculates bootstrapped p-value and critical value of test. Uses data file "gdp4706.txt".

chp_ar_t.gau: GAUSS file, calculates CHP test statistic for AR(2) vs. Hamilton Model (both with t-distributed errors). Also, calculates bootstrapped p-value and critical value of test. Uses data file "gdp4706.txt".

chp_ar_bbu.gau: GAUSS file, calculates CHP test statistic for AR(2) vs. BBU Model (both with Gaussian errors). Also, calculates bootstrapped p-value and critical value of test. Uses data file "gdp4706.txt".

chp_ar_bbu_t.gau: GAUSS file, calculates CHP test statistic for AR(2) vs. BBU Model (both with t-distributed errors). Also, calculates bootstrapped p-value and critical value of test. Uses data file "gdp4706.txt".

test_ms.gau: GAUSS file, calculates LR test for AR(2) vs. BBD (both with Gaussian errors). Also, calculates bootstrapped p-value and critical value of test. Uses data file "gdp4706.txt".

test_ms_t.gau: GAUSS file, calculates LR test for AR(2) vs. BBD (both with t-distributed errors). Also, calculates bootstrapped p-value and critical value of test. Uses data file "gdp4706.txt".


Program files most recently run on GAUSS 10 on Mac OS X. Files in the "output" directory contain the output used in the tables and figures. The bootstrap p-values and critical values may vary a bit from one simulation to the next. The output files for the bootstrap LR test are from the original simulation used for the paper, as this bootstrap experiment takes a considerable length of time to run.

